import pika
import time

connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost'))
channel = connection.channel()
channel.queue_declare(queue='rpc_queue')


def fib(n):
    if n == 0:
        return 0
    elif n == 1:
        return 1
    else:
        return fib(n - 1) + fib(n - 2)


def on_request(ch, method, props, body):
    print(f'Receive Param From Main Process:{body}')

    print(f'Calc Something......')
    response = 'Calc Result:I Am End......'

    print(f'Send Result To Main Process:{props.reply_to}......')
    ch.basic_publish(exchange='',
                     routing_key=props.reply_to,
                     properties=pika.BasicProperties(correlation_id=props.correlation_id),
                     body=str(response))
    ch.basic_ack(delivery_tag=method.delivery_tag)


channel.basic_qos(prefetch_count=1)
channel.basic_consume('rpc_queue', on_request)

print(" [x] Awaiting RPC requests")
channel.start_consuming()
